In 2004, Facebook launched to little fanfare. Today, approximately 25% of the world’s population uses it every month, and Facebook describes its mission as to create a "global community for bringing people today,"
In this lesson, students write a quadratic function
to model the number of possible connections between users on a social network. They use information about how Facebook has grown over time to determine how the number of connections has changed, and consider how well Facebook is living up to its mission: Does it help to connect us, or does it create echo chambers that leave us more separated?